I understand the title used on HN tries to follow what the article title is, but it is thoroughly useless in giving me any information on the link. Why should I even open this link?
The problem is the title gives you no information about what the letter is actually about. An open letter could do anything from raising an important for the community...to something that's tedious and irrelevant (e.g. "An open letter to the linux foundation about the lack of vegan food in the cafeteria").
This letter doesn't really inform the reader of anything. The very fact that it talks around the issue so much that you cannot even discern at all what the issue was, hints at "I don't need, nor do I want to know".